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"I don't know obviously these individual allegations but I think this was going to come to a head at some point anyway," he told BBC Newsnight.

"If it's got to the point where a teacher is unable to continue in a class and needs to seek support they would come to a head teacher or a depute head and we would remove that child from the class to have a conversation with them about what's behind all of this."

Eventually, though, this will all come to a head.

It was just something that I wanted to have in the show and a constant emotion to track with my mother there, and having it come to a head in the seventh episode in a wonderful mother-daughter moment.

There have been longstanding calls for the system to change, but the issue has come to a head recently, as the Senedd prepares to expand to 96 members with a new electoral system.